Rectangular jigsaw puzzle



FIG. 1 is a top plan view of a rectangular jigsaw puzzle showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side being identical; and,

FIG. 4 is a front elevational view thereof, the rear being identical. 

I claim the ornamental design for the rectangular jigsaw puzzle, as shown and described. 